由于字?jǐn)?shù)過(guò)于長(zhǎng)，動(dòng)態(tài)放不下，所以就放專欄了。

Firefly在6號(hào)凌晨放出了一段視頻，但該視頻很快被刪除，該視頻被網(wǎng)友很快下載了下來(lái)并重新上傳。同時(shí)該視頻的描述附上了有關(guān)這次任務(wù)失敗的更多細(xì)節(jié)。

UP現(xiàn)已更新至P3:

（更新：Firefly已上傳完整視頻，現(xiàn)已更新到1P，后面的順延）

新視頻顯示了有一臺(tái)發(fā)動(dòng)機(jī)在火箭升空后不久即關(guān)閉，隨后多次嘗試重啟失敗，從而導(dǎo)致火箭在MAX-Q附近姿態(tài)出現(xiàn)異常，激活了FTS，發(fā)生爆炸。并表示發(fā)動(dòng)機(jī)沒(méi)有發(fā)生故障，只是推進(jìn)劑閥門(mén)關(guān)閉。（推測(cè)可能是軟件問(wèn)題或連接到發(fā)動(dòng)機(jī)的閥門(mén)出現(xiàn)故障）。

以下是視頻描述內(nèi)容：

Firefly conducted the first flight test of our Alpha vehicle on September 2, 2021. Although the vehicle did not make it to orbit, the day marked a major advancement for the Firefly team, as we demonstrated that we "arrived" as a company capable of building and launching rockets. We also acquired a wealth of flight data that will greatly enhance the likelihood of Alpha achieving orbit during its second flight. In short, we had a very successful first flight.

Here are a few specific notes about the flight:

The vehicle released and cleared the pad correctly. The various connections and moving mechanisms connected to the rocket all worked correctly. The vehicle controlled itself perfectly off the pad, with thrust vectoring eliminating all tipping or rotation, and the vehicle increased in speed at the exact rate that was predicted in modelling.

About 15 seconds into the flight, engine 2 (there are four Reaver engines on the first stage) shut down. It was an uneventful shutdown – the engine didn't fail -- the propellant main valves on the engine simply closed and thrust terminated from engine 2.

The vehicle continued to climb and maintain control for a total of about 145 seconds, whereas nominal first stage burn duration is about 165 seconds. However, due to missing the thrust of 1 of 4 engines the climb rate was slow, and the vehicle was challenged to maintain control without the thrust vectoring of engine 2. Alpha was able to compensate at subsonic speeds, but as it moved through transonic and into supersonic flight, where control is most challenging, the three engine thrust vector control was insufficient and the vehicle tumbled out of control. The range terminated the flight using the explosive Flight Termination System (FTS). The rocket did not explode on its own.

Firefly has commenced a thorough anomaly investigation to gain understanding of why engine 2 shutdown early, and uncover any other relevant unexpected events during flight. We will report root cause of the anomaly at the end of this investigation. In collaboration with the FAA and our partners at Space Launch Delta 30, we will return to conduct the second Alpha flight as soon as possible.

This video montage shows the entire mission from a variety of camera angles. Enjoy.

翻譯（Google機(jī)翻）：

Firefly 于 2021 年 9 月 2 日對(duì)我們的 Alpha 飛行器進(jìn)行了首次飛行測(cè)試。盡管飛行器沒(méi)有進(jìn)入軌道，但這一天標(biāo)志著 Firefly 團(tuán)隊(duì)取得了重大進(jìn)展，正如我們所展示的 我們“到達(dá)”是一家能夠制造和發(fā)射火箭的公司。 我們還獲得了大量的飛行數(shù)據(jù)，這將大大提高阿爾法在第二次飛行中進(jìn)入軌道的可能性。 簡(jiǎn)而言之，我們的首飛非常成功。

以下是有關(guān)飛行的一些具體說(shuō)明：

車(chē)輛正確釋放并清除了墊子。 連接到火箭的各種連接和移動(dòng)機(jī)構(gòu)都正常工作。 車(chē)輛完全脫離墊板進(jìn)行自我控制，推力矢量消除了所有傾斜或旋轉(zhuǎn)，并且車(chē)輛以建模中預(yù)測(cè)的準(zhǔn)確速率增加了速度。 飛行大約 15 秒后，2 號(hào)發(fā)動(dòng)機(jī)（第一級(jí)有四個(gè) Reaver 發(fā)動(dòng)機(jī)）關(guān)閉。 這是一次平穩(wěn)的停機(jī)——發(fā)動(dòng)機(jī)沒(méi)有發(fā)生故障——發(fā)動(dòng)機(jī)上的推進(jìn)劑主閥只是關(guān)閉，推力從發(fā)動(dòng)機(jī) 2 終止。

車(chē)輛繼續(xù)爬升并保持控制總共約 145 秒，而標(biāo)稱的第一階段燃燒持續(xù)時(shí)間約為 165 秒。 然而，由于缺少 4 個(gè)發(fā)動(dòng)機(jī)中的 1 個(gè)的推力，爬升率很慢，并且在沒(méi)有發(fā)動(dòng)機(jī) 2 的推力矢量的情況下，飛行器面臨著保持控制的挑戰(zhàn)。Alpha 能夠以亞音速進(jìn)行補(bǔ)償，但是當(dāng)它通過(guò)跨音速和 進(jìn)入超音速飛行，控制是最困難的，三引擎推力矢量控制不足，飛行器失控翻滾。 該范圍使用爆炸性飛行終止系統(tǒng)（FTS）終止飛行。 火箭并沒(méi)有自行爆炸。?

Firefly 已開(kāi)始徹底的異常調(diào)查，以了解發(fā)動(dòng)機(jī) 2 提前關(guān)閉的原因，并發(fā)現(xiàn)飛行過(guò)程中的任何其他相關(guān)意外事件。 我們將在調(diào)查結(jié)束時(shí)報(bào)告異常的根本原因。 與 FAA 和我們?cè)?Space Launch Delta 30 的合作伙伴合作，我們將盡快返回進(jìn)行第二次 Alpha 飛行。

該視頻蒙太奇從各種攝像機(jī)角度展示了整個(gè)任務(wù)。 享受。